Cannondale Supersix vs Supersix Evo

Hi,
I'm looking at a 2nd hand cannondale supersix and just wondered if anyone had any experience of both the supersix and the supersix evo (just the standard one not the Hi-Mod)? I know the evo is a bit lighter but is the difference really noticeable or would I be better waiting and saving for a Evo?
Thanks in advance
I'm looking at a 2nd hand cannondale supersix and just wondered if anyone had any experience of both the supersix and the supersix evo (just the standard one not the Hi-Mod)? I know the evo is a bit lighter but is the difference really noticeable or would I be better waiting and saving for a Evo?
Thanks in advance
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